Correcting mechanism for adding-machines.



No. 745,540. PATENTED DEG. l, 1903. G. WALES.

CURRECTING MECHANISM FOR ADDING MACHINES.

.APPLICATION FLED SEPT. 17. 1902.

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No. 745,540. lPATEN'IED DEC. l, 1903. C. WALES.

CORREGTING MEGHANISM POR ADDING MACHINES.

APPLICATION FILED SEPT. 1v, 1902. No MoDBL. 4 SHEETS- SHEET 2.

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No. 745.540. PATENTBD DBG. 1, 190s.

- C. WALES. GORREGTING MEUHANISM FOR ADDING MACHINES.

APPLICATION FILED SEPT. 17, 1902.

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1441@ Moz M M Elccomw No. 745,540. PATBN'IED DEC. l, 1903.

G. WALES.

CORRECTING MECHANISM I'OR ADDING MACHINES.

APPLICATION FILED SEPT. 17, 1902.

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UNITED STATES Patented December 1, 1903.

PATENT CEEICE.

CHARLES IVALES, OF DETROIT, MICHIGAN.

SPECIFICATION forming part of Letters Patent No. 745,540, dated December 1, 1903.

Application iiled September 17. 1902. Serial No. 123.740. (No model.)

To @ZZ when?! it' may concern:

'13e it known that I, CHARLEs WALES, a citizen of the United States, and a resident of Detroit, in the county of lVayne and State of Michigan, haveinvented certain new and useful Improvements in Correcting Mechanisms for Adding-Machines, of which the following is a specification.

My invention relates to adding-machines adapted to be operated by keys bearing numerals, and more particularly to that part of the mechanism designed to return a key which has been wrongly struck to its original posi tion, so that the proper key can be struck, the novelty of my device consisting in the fact that the correcting mechanism operates to affect only the key which has been misplaced without affecting any of the other rows of keys in the machine and without disturbing the other steps in the addingI operation and in the means employed to secure the result referred to.

I have described and claimed the general features of my adding-machine of which the particular mechanism herein described and claimed forms a part in a copending` application iiled by me on the 12th day of September, 1902, Serial No. 123,133, and I referto that application for a more particular description of the general mechanism.

The oeneral mechanism comprises a ke fboard and key-levers which will remain in either one of their two positions until removed therefrom by an impulse received from the operator through the keys or other parts of the machine. These levers serve to operate a ployed which holds the racks until the number desired to be added has been written on the keyboard.

The racks which ac'tuate the numeral-wheels are returned to their original positions through the operation of a main lever, which simultaneously rotates the numeral-wheels communicating with the racks which have been displaced. The wheels are all returned to Zero by means of a device which I call a rake, which has a rotary motion parallel to the wheels and which engages certain pins thereon, and these pins also serve to set the carrying mechanism which when one wheel passes the numeral 9 causes the next wheel to be moved one step or number forward.

The particular mechanism which is the subject of this application is illustrated in the accompanying drawings, in which Figure l is an exterior perspective v iew of the machine. Fig. 2 is a side elevation of a train of mechanism for one section of the machine and some of the adjacent parts. Fig. 3 is a plan view of the machine with some of the upper parts removed. Fig. d is an enlarged side elevation and partial section in detail of a correcting-key and some of its adjacent parts. Fig. 5 is a plan view of the same. Fig. Gris a front view of the upper parts of the machine back of the plane of the line G 6 in Fig.

As above stated, a stop-and-release plate S0 is employed to hold the rack 71 until the number desired to be added has been written on the keyboard.

The striking of each key 60, and the consequent raising of its stop-bar 67, lifts a dog 70 over the row of stops in which that particular stop is located, so that when the rackbars 7l are released by pressing an arm Sl and raising the release-plate 8O the rack-bars opposite the stops which have been set will fly forward until they come into contact with said stops. The dogs 70 over the rows in which no stop has been set will prevent the forward movement of their respective rackbars when released by the raising of the plate.

The retrograde movements of the several racks 71 will rotate the numeral-wheels 90 to the extent necessary to bring the desired number up to the predetermined point where the said number can be viewed or registered by means of the mechanism which is fully described in the application before referred to. It is obvious, therefore, that if the dogs 70 IOO are depressed after a key hasbeen struck such depression Will return any stop-bar 67 which may have been moved to its normal position and, moreover, Without aii'ecting any of the other rows of bars. For the purpose of accomplishing this object I mount a row of correcting-keys 110 in the top plate 22 of the casing of the machine, one such correctingkeybeing provided foreach longitudinal row of numeral-keys and stops. These keys are cach provided with a rod 111, which passes through a spring-sleeve 112. These sleeves are fitted vertically into the top plate of the casing of the machine and hold their said rods and keys normally in their uppermost position. The rods 111 of the keys 110 are so arranged that when depressed they impinge upon the dogs 70 and in the manner above referred to return any stop-bar (37 to its original position if it has been inadvertently struck. The proper key in the corresponding row can then be struck and the adding operation continued.

Vhat I claim is- 1. The combination with register-Wheels, of reciprocating rack-bars for actuating them, stops adapted to limit the movement of the rack-bars, numeral-keys positively connected With and adapted to actuate said stops into the path of movement of the bars, and keys whereby the stops affecting each rack,and the corresponding keys, may be independently restored to their normal positions.

2. The combination of a series of registerwheels, a pinion communicating With each wheel, a rack engaging each pinion, a series of nine stops adapted to be interposed into the path of each rack and limit the movement ofthe same, numeral-keys positively connected With and operating the stops, dogs normally in the path of said racks and adapted to be displaced by the movement of said stops, a key for each dog having a rod adapted to impinge upon the said dog and return said stops and numeral-keys to their normal posiL tions.

3. The combination With a register-wheel, and an actuating-rack therefor, of a series of nine numeral-keys, nine pivoted levers positively connected With the keys, nine stops for limiting' the movement of the actuating-rack positively connected with the levers, a single dog in the path of the actuating rack and adapted to'be removed therefrom by either of the stops,and a single key Whose rod impinges upon and returns the dog, said stops and the numeral-keys to their normal positions when said single key is depressed.

L1. The combination of a series ol' register- Wheels bearing numerals, a shaft upon which the same are mounted, ratchets fixed to said Wheels, a pinion and a paivl thereon adapted to engage each ratchet, a rack having reciprocating' movement, stops adapted to be interposed into the path of said rack and limit its movement, a depressible key and rod and a plate normallyin the path of said rack upon which the rod of said key impinges when depressed, said plate bearing upon said stops.

5. The combination of a series of register- Wheels, a pinion communicating with cach Wheel and a rack engaging the pinion, means for reciprocating said rack, a movable plate for holding said rack in its normal position, stops adapted to limit the motion of said racks when released by the plate, dogs normally in the path of said racks and adapted to be moved therefrom by said stops,and keys and rods adapted to replace said dogs and move said stops from the path of the rack.

lVitness my hand this 28th day of August, 1902, at the city of Port Huron, in the county of St. Clair and State of Michigan.

CHARLES VATJICS.

lVitnesses:

PETER J. ABT, WM. L. JANUARY. 

